About RunBikeCalc

I'm an avid cyclist and endurance athlete—I completed my first Ironman 70.3 in 2025 and I've been hooked on data-driven training ever since. I built RunBikeCalc because I couldn't find all the tools I needed in one place.

Whether I was calculating my Zone 2 heart rate for base building, figuring out my FTP for power-based workouts, or planning race pacing strategies, I was constantly bouncing between different websites with inconsistent formulas. It was frustrating. So I decided to build something better.

Every calculator on this site has been personally tested through my own training. I use these tools every week—they're not theoretical, they're practical. I've refined them based on real-world feedback from athletes at every level, from people just getting off the couch to competitive racers chasing PRs.

My goal is simple: give you free, accurate tools that actually help you train smarter. No subscriptions, no paywalls, no BS. Just the calculations you need to get faster and stay healthy.

A quick note on how I keep the lights on: Some of the product links in my gear guides are affiliate links. If you buy something through one of those links, I earn a small commission at no extra cost to you. I only recommend gear I've actually used or thoroughly researched—I'm not going to shill junk just to make a buck. These commissions help me keep the calculators and training plans completely free. Thanks for the support!